Remove the oil inlet and outlet lines from
w i t h clean engine oil.
the engine and thoroughly clean the oil
lines inside and out. An oil line that is
2. Install a new snap ring (26), bearing
dented or crimped enough to restrict the
washer (25), bearing (24 and snap ring
flow of oil must be replaced.
(23) in the turbine end of center housing
(27).
Inspection
3. Install a new snap ring (22), bearing
washer (21) and bearing in the compres-
Inspect all of the parts for signs of dam-
sor end of the center housing.
for nicked, crossed or stripped threads.
NOTE
Visually check t h e t u r b i n e w h e e l f o r
Install the inboard thrust bearing
signs of rubbing or wear. For shaft
(three oil grooves) with the smooth
bearing journal dimensions and wear lim-
side against the center housing.
r e f e r t o "Specifications" on page
its,
11D-32.
4. Install a new piston ring(s) (17) on
Inspect the shaft for signs of scoring,
thrust spacer (16) and gently insert the
scratches or bearing seizure.
spacer into backplate assembly (14).
rubbing or damage from foreign material.
Check to see that the wheel bore is not
galled.
The wheel must be free of dirt
D o not force the piston rings into
and other foreign material.
place.
Inspect the seal parts for signs of rub-
bing or scoring of the running faces.
5. M a k e s u r e t h e c o m p r e s s o r b e a r i n g i s
in p l a c e , t h e n p o s i t i o n t h e n e w i n b o a r d
Inspect the backplate for wear or dam-
thrust bearing (19) flat against the cen-
aged bore (piston ring groove).
ter housing with the hole and cutout in
the thrust washer in alignment with the
Inspect the housing for contact with the
pins in the center housing.
r o t a t i n g p a r t s . T h e oil and air passages
must be clean and free of obstructions.
6. Install thrust collar (18) snugly
against the thrust washer.
Lubricate
Minor surface damage may be burnished
the thrust collar and thrust washer with
o r p o l i s h e d . U s e a silicone carbide abra-
clean engine oil.
sive cloth for aluminum parts or a crocus
abrasive cloth for steel parts.
7. Install a new seal ring (15) in the
that
the piston
recommended
It
is
ter housing.
ring(s), thrust washers, bearing, bear-
ing washers and snap rings be replaced
8. Align the oil feed holes in the center
a t time of disassembly.
housing and the backplate assembly and
attach the backplate to the center hous-
Inspect the exhaust outlet elbow seal
ing with four bolts (12) and new lock-
ring for signs of wear or breakage.
Tighten the bolts to 80-100
plate (13).
lb-in (9-11 Nm) torque and bend the
l o c k p l a t e tangs up against the side of the
A s s e m b l e Turbocharger
b o l t heads.
Check each part prior to installation to
ensure cleanliness. As the parts are as-
NOTE
sembled, c o v e r t h e o p e n i n g s t o p r e v e n t
If a new backplate with a warning
entry of dirt or other foreign material.
p l a t e i s inadvertently
installed,
the warning plate must be removed
Refer to Figure 11D-30 on page 11D-24
and the three drive screw holes
for parts orientation and proceed as fol-
plugged to prevent air leakage.
lows: